Guess I'm a tard, but I wasn't talking about 24 degree curves; I meant 24" radius curves. Experience has taught me the hard way that sometimes less is more. Given that you want to operate 'modern' equipment, which tends to be longer, than say 40' box cars, and F7 cab units, it wouldn't hurt visually or operationally, to bump your radius up to 24". While I can understand the desire to get something running quickly(I haven't had a running layout since 2007), hurrying things, including ignoring important details like manufacturer's or NMRA suggested minimum radii, if you want to avoid frustrations such as constant derailments due to bad track/unreliable operation, in the future will only save you time, money, and ultimately frustration, down the road. Judging by some of the dimenisons of your space that you mentioned, you ought to be able to jump up from 22" to 24" radius, without to many problems. Experience has taught me that any corners cut up front, only add to woes down the line.
What ever you decide, good luck! Keep those photos and postings coming!